<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示信息 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClick"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action:图片上传的后台API地址 
            本地:http://127.0.0.1:8888/api/private/v1/
            网络:https://www.liulongbin.top:8888/api/private/v1/
            -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <!-- <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div> -->
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: "0",
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属分类数组
        goods_cat: [],
        //图片的数组
        pics: [],
        //商品的详情描述
        goods_introduce:'',
        attrs:[]
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" }
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" }
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" }
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" }
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" }
        ]
      },
      //商品分类列表
      cateList: [],
      //级联选择器配置对象
      cateProps: {
        expandTrigger: "hover",
        label: "cat_name",
        value: "cat_id",
        children: "children"
      },
      //动态参数列表数组
      manyTableData: [],
      //静态属性列表数组
      onlyTableData: [],
      //图片的上传地址
      // uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      uploadURL: "https://www.liulongbin.top:8888/api/private/v1/upload",
      //图片上传请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem("token")
      },
      previewPath: "",
      previewVisible: false
    };
  },
  created() {
    this.getList();
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    }
  },
  methods: {
    //最终添加商品
    add(){
      this.$refs.addFormRef.validate(async valid => {
        if(!valid){
          return this.$message.error('请填写必要的表单项!')
        }
        //执行添加的业务逻辑
        //lodash cloneDeep(obj)
        const form = _.cloneDeep( this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        //处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
          this.addForm.attrs.push(newInfo)
        })
        //处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals}
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form);
        //发起请求，添加商品,商品名称必须唯一
        const {data:res} = await this.$http.post('goods',form)
        if(res.meta.status !== 201){
          // console.log(res.meta.msg);
          
          return this.$message.error(res.meta.msg)
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
      // console.log(this.addForm);
      
    },
    async getList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败!");
      }
      // console.log(res.data);

      this.cateList = res.data;
      // console.log(this.cateList);
    },
    //级联选择器
    handleChange() {
      // console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
      // console.log(this.addForm.goods_cat);
    },
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    async tabClick() {
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" }
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取失败!");
        }
        // console.log(res.data);
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableData = res.data;
        // console.log(this.manyTableData);
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" }
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取失败!");
        }
        // console.log(res.data);

        this.onlyTableData = res.data;
      }
    },
    handlePreview(file) {
      // console.log(file);
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },
    handleRemove(file) {
      // console.log(file);
      //1.获取删除图片临时路径
      const filePath = file.response.data.tmp_path;
      //2.从pics数组中找到他的索引值
      const index = this.addForm.pics.findIndex(x => {
        x.pic === filePath;
      });
      //3.调用splice
      this.addForm.pics.splice(index, 1);
      console.log(this.addForm.pics);
    },
    handleSuccess(response) {
      // console.log(response);
      //1.拼接得到图片信息对象，2push进pics数组
      const picInfo = { pic: response.data.tmp_path };
      this.addForm.pics.push(picInfo);
      console.log(this.addForm.pics);
    }
  }
};
</script>

<style scoped>
.el-checkbox {
  margin: 0 10px 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}

</style>